Billy, on the move again, ends up in Chihuahua, Mexico, with a new Mexican friend called Segura. Together they enjoy several risky escapades – but in the end, Billy risks losing his life.

Billy rides into Lincoln County to join up with the gang, who are working for Lincoln's most powerful boss, Major Murphy. Murphy wants them to get rid of his new competitor, John Tunstall. Billy finds himself torn between the two rivals.